How mentoring develops yourself and the next generation of gamedev professionals (lessons after 150 mentoring sessions)

As one gains experience as a gamedev specialist, he or she realizes that their knowledge can be useful to others, including beginners who want to start a career in this field.
But it is difficult to understand where to start: where to look for mentees, how to help them, how to reduce the number of the recurring questions, and how to keep in touch further.
Mentoring is one of the most powerful tools to quickly improve yourself, increase your media exposure, and fight impostor syndrome as a gamedev specialist.